<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>数据统计</el-breadcrumb-item>
          <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 2.为ECharts准备一个具备大小(宽高)的Dom -->
            <div id="main" style="width: 100%;height:500px;"></div>
        </el-card>
    </div>
</template>

<script>
// 1.导入 echarts
import echarts from 'echarts'
import _ from 'lodash'
console.log(echarts)

export default {
  data () {
    return {
      // 需要合并的数据
      options: {
        title: {
          text: '用户来源'
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            label: {
              backgroundColor: '#E9EEF3'
            }
          }
        },
        grid: {
          left: '3%',
          right: '4%',
          bottom: '3%',
          containLabel: true
        },
        xAxis: [
          {
            boundaryGap: false
          }
        ],
        yAxis: [
          {
            type: 'value'
          }
        ]
      }
    }
  },
  created () {},
  //   此时页面上的元素,已经被渲染完毕了!
  async mounted () {
    // 3.基于准备好的dom，初始化echarts实例
    var myChart = echarts.init(document.getElementById('main'))
    const { data: res } = await this.$http.get('reports/type/1')
    if (res.meta.status !== 200) {
      return this.$message.error('获取折线图数据失败')
    }
    // 4.准备数据和配置项
    const result = _.merge(res.data, this.options)
    // 5.展示数据
    myChart.setOption(result)
  },
  methods: {}
}
</script>

<style lang="less" scoped>

</style>
